Titanium frame, sapphire glass, and 100m water resistance provide ultimate durability. Weighing only 59g including the watch strap, you can take the Apex Pro on nearly any adventure you dream of. The Coros Trainer accurately measures and predicts your endurance, aerobic and anaerobic training effects, and offers recovery times. This way, a complete training program is built tailored to your fitness level and training needs. With the UltraMax setting, the battery can last up to 100 hours with GPS, while the normal GPS mode allows for up to 40 hours and regular use up to 35 days. Constant charging is a thing of the past. Customize your activities to meet your training requirements, from setting up a Brick Run to creating your own Duathlon. It's all up to you. The Apex Pro monitors blood oxygen levels around the clock in altitude mode and provides hourly acclimatization assessments. Your watch indicates when you should continue climbing or when to return to a lower altitude. Coros introduces touchscreen technology for the first time in the Apex Pro. The touchscreen enhances the already user-friendly functionality of the Apex, making it even easier to use. With the touchscreen and the enlarged digital button, you can easily navigate your route up and down, left and right, and zoom in and out. The Apex Pro offers a variety of metrics for your different endurance activities. Beyond pace and distance, you can track your stride length, cadence, and elevation change along with a measurement of your aerobic and anaerobic productivity. The Apex Pro also provides recovery recommendations and estimates important metrics like VO2Max and lactate threshold through the Coros app, which can be used to create training plans.